I will not Defend it nor will I Recomend it.
My Story
I was happily vaping single coil cartotanks for a year or more when the Pro Tank 1 came out. I thought it looked cool and people were saying good things so I got one. Gurgling ,Burning, Leaking and Horrible taste! In the drawer it went. A couple weeks or months later everybody had a fix for it. I watched some Youtube and read all the newest fixes. I tried everything and finaly got it working good

. 4 or 5 hits later I drop it on a tile floor and break it.
Fast forward : Pro Tank II comes out Im like this is New and Improved and I got the other one to work. So a week later I try it out and it does the same things that the old model did. I was like (I am so stupid) so i cleaned it rebuilt it with all the latest tips. I fixed all the problems but after those previously mentioned 4 or 5 good hits the Horrid taste was back.
I have vowed to never waste another minute on this thing again!!!
Carto Tanks for life!! and a few rebuildables when im bored or want to drip.
So now when I see someone recomend it to a Noob I just cringe and think about how I would have given up on vaping years ago if the Pro Tank was all I had...